underkeel龙骨: a bird's sternum fossil frag ...下: below; down; under; undernea ...的: 4次方是 The fourth power of 2 i ...龙骨下水深: underkeel clearance耻骨下的: subpubic下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:龙骨下的，即可在微信中查询翻译
